@article{LiawKC99,
  title = {Integral Sum Numbers of Graphs},
  author = {Sheng-Chyang Liaw and David Kuo and Gerard J. Chang},
  year = {1999},
  tags = {graph-rewriting, rewriting},
  researchr = {https://researchr.org/publication/LiawKC99},
  cites = {0},
  citedby = {0},
  journal = {Ars Comb.},
  volume = {54},
}